Power-transmitter.



No. 719,030. PATENTED JAN. 27, 1.9013.

W. MOHAFFIE. POWER TRANSMITTER! APPLIoATIoN FILED un 14, woz. No MODEL.

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No. 719.030. y

l PATBNTBD JAN.27,1903 w. MOHAPFIB.

POWER. TRANslszrITTBR-l l v APPLIoATIoN-I *Imin nun, 1902. I0, MODEL.

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witnesses l v jwvewtoz OZH | sms Pnms cn. M010 'mo nire 'raras WILLIAMMCHAFFIE, OF NEW YORK, N. Y.

POWER-TRANSMITTER.

SPECIFICATION forming part of Letters Patent N0. I719,030, dated.January 27, 1903 Application filed May 14:, 1902. Serial No. 107,262.(No model.)

r of the borough of Manhattan, in the city,

county, and Stateof New York, have invented certain new and usefulImprovements in Power-Transmitters, of which the following is aspecification.

My invention relates to improvements in mechanism for transmitting powerfrom a main driving-shaft, Which'is constantly in motion, to sewing orother similar machines, which are adapted to alternately run and stop;and it consists of certain additional improvements to the mechanismdisclosed in my prior patent, No. 656.469, dated August 2l, 1900.Thetransrnitter mechanism of said patent includes a movable frame orbrackethaving a rotatable transmitter-shaft supported thereby insuitable bearings, the said shaft projecting at each end beyond the endsof the frame and having friction-disks thereon and the said frame mbeingmovable with the supported transmitter-shaft to move the friction-diskson the latter either into or away from engagement with the driving anddriven disks or parts. ln order that such transmitter may be readily adjusted to machines of different heights and sizes and also adjusted tovary the speed transmitted to the driven machine, the friction-disks arelongitudinally adjustable on the transmittershaft. In making thesedesired adjustments to the disks it sometimes becomes necessary tolocate the same `a considerable distance from the ends of thetransmitter-shaft-supporting frame, in which event the projectingdisk-supporting ends of the shaft, by reason of having no direct bearingor support at their eXtre me outer end,are liable to spring under thepressure applied thereto when its disks are forced into contact with thedriving and driven parts, and so cause the shaft to bind more or less inits bearings. To avoid possibility of such springing of thetransmittershaft and without interfering with the necessary adjustmentsof the disks thereon has been one of the principal objects of my presentinvention, and I accomplish this by providing bearings for the shaft atopposite sides of each disk and located at sufiicient distances apart topermit of a desired adjustment of the disk therebetween, the saidbearings at the opposite sides of each disk being rigidly united by asuitable connection in the form of an offset.

ln the operation of the transmitter the friction-disks are usuallyrotated at a very considerable speed and are liable to cause damage orinjury to anything coming in contact therewith. In the transmitterdisclosed in my prior patent these disks are exposed and unguarded,audit has therefore been another one of the objects of my presentinvention to provide a simple and effective means for guarding the said`disks against undue contact therewith of any foreign object and withoutinterfering in any way with their operation-or adjustment. I accomplishthis by providing a covering or hood for each disk, which is supportedby the transmitter and is adjustable to either cover the disk or toexpose the same for the purposes of adjustment or otherwise.

Other objects and advantages of the invention not hereinbefore referredto, but which will be hereinafter described, are illustrated in theaccompanying drawings, in which- Figure l is a front elevation of aportion of a sewing-machine power-table with my improved transmitter inposition thereon, showing the relative positions of the transmitter, thedriving-disk, and the sewing-machine, the latter being broken away atits front end. Fig. 2 is an end elevation of the same looking toward theleft, as viewed in Fig. l, with certain of the parts partly broken away.Fig. 3 is a sectional detail showing the connection and adjustmentbetween certain of the parts at one end of the transmitter.

ln said drawings, 1 indicates a power-machine table of ordinaryconstruction; 2, a sewing-machine head, partly broken away, supportedupon said table; 3, the usual hand wheel or disk, which is made fastupon the end of the driving-shaft of said machine, and 4 the mainpower-shaft supported in suitable bearings beneath the table l andprovided with a driving4 disk or wheel 5, made fast thereon. Thetransmitter in this vcase for communicating motion from the said driving`disk or wheel 5 to the disk or wheel 3 ofthe IOO machine, like that ofmy prior patent in certain general features, comprises a pivoted frameor bracket 6, having a rotatable shaft 8, supported thereby, upon whichare adjustably secured two friction-disks 2O and 21, the said partsbeing so arranged that by rocking the frame or bracket 6 inthe properdirection the friction-disks on the shaft 8 may be caused to eitherengage with the disks 5 and 3, and so cause motion to be imparted to themachine, or be disengaged from said parts to` permit the machine to bebrought to a stop. In accordance with my present invention the frame 6is provided, at each end thereof, with a bearing for the shaft 8,comprising a sleeve 9, which is longitudinally adjustable Within atubular portion 10 of the frame and is secured in a stationary adj ustedposition relative to the latter bya set-screw 1l. This bearing-sleeve 9projects at one end beyond the adjacent end of the frame 6 and isprovided with an offset portion or wall 12, so as to provide bearings 1414 for the shaft 8 at a considerable distance apart to permit of thelocation and adjustment of the friction-disk on the shaft therebetween.The said bearings 14 14, although supported at some distance apart, asdescribed, are so rigidly u nited by the connecting offset wall l2 thatthe outer bearing serves to rmly support the shaft 8 at its outer endand prevent springing of the same.

The hood for covering and protecting the friction-disk at each end ofthe transmitter is formed, in the present instance shown, by the saidoset wall 12 of the sleeve 9, which is made ofvsufcient width to inclosethe disk at one side, and two movable wall sections or slides 15 15,which are slidingly supported upon the said fixed wall-section 12, to bemovable to and from a position to further inclose the disk, it being ofcourse understood that a sufficient opening or space must remainunclosed to permit of the engagement of the friction-disk with theadjacent driving or driven disk, which it is adapted to engage. Themovable wall-sections l5 15 may be each' removably and slidinglyretained in connection with the fixed Wall-section 12 by any suitablemeans, a set-screw 16, connected with the fixed wall-section andengaging with each of the movable wallsections through an elongated slot17 therein, being employed for such purpose in the present case. Whenthe transmitter is in operation, the movable sections of the hood willof course be moved to a position to inclose the friction-disks; but atany time it may be desired to reach the said disks for the purposes ofadjustment or otherwise this may be done by loosening one or both of thesetscrews 16 and then sliding the movable wallsection backward or in adirection to expose the disk. When the movable wall-sections are thusmoved backward, however, the desired access to the exposed side of thehood may be interfered with somewhat by the adjacent driving or drivendisk, in which event the bearing-sleeve 9 may be turned in its bearingafter loosening the set-screw 11 so as to turn the said exposed side ofthe hood outward, when free access to the same may be had. In adjustingthe friction-disk on the shaft 8 for the purpose of varying the speed tobe transmitted to the driven part or for the purpose of adapting t-hetransmitter to machines of different heights or sizes if the space inthe hood between the bearings 14 14 is not suflicient to permit of thedesired adjustment the said hood may be adjusted longitudinally on theshaft to permit of such additional adjustment by moving the sleeve 9 inthe proper direction relative to the frame 6.

The transmitter may be supported in any suitable manner to permit of itsbeing moved to and from a position for effecting operative engagementwith the driving and driven parts, such support of the transmitter beingeffected in the present case by pivoting the frame 6 at a point betweenits ends upon a suitable support, such as the pin or bolt 22, wherebythe transmitter may be rocked to and from its said operative position,this rocking action being permitted in effecting the change in positionof the transmitter by reason of the latter being arranged to engage withopposite sides of the respective driving and driven disks or parts, asshown. In order to provide for the necessary adjustments to enable thetransmitter to be readily and accurately positioned on the tablerelative to the driving and driven parts, the saidtransmitter-supporting pin or bolt 22 has a longitudinally andhorizontallyadjustable connection withabracketplate 23, to which it issecured in adjusted position by suitable clamping-nuts 24 24, and thesaid plate 23 has a horizontally and vertically adjustable connectionwith a stationary bracket-plate 25, depending from the under side of thetable 1, to which it is secured by a clamping-bolt 26,each of saidplates being provided with an elongated slot 27, arranged at rightlangles to each other, through which the said clamping-bolt 26 extendsto permit of the horizontal and vertical adjustments of the plate 23referred to. tween the bracket-plates 23 and 25 and having a pair oflips or flanges 28 28 at one side thereof embracing the edges of thebracketplate 25 and having a second pair of lips or flanges 29 29 on itsopposite side arranged at right angles to the former and embracing theedges of the adjustable bracket -plate 23, serves to movably hold thelatter from turning and in its normal horizontal position relative tothe stationary bracket-plate 25.

The transmitter may be moved or rocked to and from its operativeposition of engagement with the driving and driven disks or parts by anysuitable means, the means employed inthe present case being as follows:A short rock-shaft 30 is journaled in a sup- IOO IIO

A plate 28, located beporting-,bracket 3l on the upper side of the table1 and is provided with two arms32 and i 33, thearm 32 having a Acam 34,adjacent to lframed near its -itsouter end, arranged to engage with anantifrietion-roll .35,sec n red to the transmitterupper end, and thesecond arm 33 having connection with a foot-tread-le 436 through themedium of a rod 37. By pressing downwardnpon the treadle 36 theoperatormay cause the cam 34 to engage with `the roll 35, and so `rockthetransmitter into :operative engagement with the driving and drivenparts, whereby motion will be transmitted to the latterfa spring 38,connected at one end with the rod 37 and at its opposite 'end with thetable, serving to automatically raise the cam-arm and release thetransmitter lfrom its operative engagement with the driving and drivenparts when the operator relieves the pressure on the treadle. An ad-'instable stop 40, carried bythe rock-arm 33,

, In order that the machine may be )brought at the lower end of i' to aquick stop after the transmitter has been released from operativeengagement therewith, I have provided the rockarm `33 with an extension4l, having a piece of leather or similar material 42 thereon, which isadapted to be forced into engagement with the disk 3 of the machine uponthenpward movement of the arm 33 when pressure is removed from thetreadle'and serve as a friction-brake to stop theA machine. o Y.

As an important feature of my present invention I support thetransmitteriu such position relative to the driving and driven parts ordisks that when it is'in its inoperative position, as fshown in Fig. l,the friction-disk t/lie transmitter will be closer lo the driving-diskthan the other friction-disk to the driven disk, as shown. This'arrangement causes the 'said lower frictiom disk upon the rocking of thetransmitter to first engage with the driving-disk and cause aconsiderable speed tobe imparted to the Vtransmitter-shaft before theother frictiondisk has engaged with the disk of the machine,so that whenthe latter engagement takes place the machine will be caused to quicklyoperate at a high speed;

v Having thusset forth my invention, what I claim, and desire to secureby Letters Patforth. i

ent, is-

1. A power-transmitter, comprising a rotatable shaft, diskslongitudinally adjustable thereon, and a supporting frame or bracketprovided with bearingsfor said shaft at each side of the disks thereon,for the purpose set 2. A power-transmitter, comprising a rota" tableshaft, 4a disk longitudinally adgustable ,eso

thereon, and a supporting frame or bracket provided with bearings forsaid shaft at each` I side of the disk thereon, for the purpose setthereon, and a supporting frame or bracket Y provided with bearings forsaid shaft at each side of the disk thereon, the said hearings beingconnected by an offset wall.

4.. A. power-transmitter, comprising a rotatable shaft, a disklongitudinally adjustable thereon, and a supporting frame or bracketprovided with bearings for said shaft at each side of the disk thereon,the said bearings being connected by an offset wall and being adjustablerelative to the frame or bracket.

5. A power-transmitter, comprising a rotatable shaft, a disklongitudinally adjustable thereon, and a supporting frame or bracketprovided with bearings' for said shaft at each side of the disk thereonand with a hood for partial-ly incl'osingsaid disk.

(i. A power-transmitter, comprising a rotatable shaft, a disklongitudinally adjustable thereon, and asupporting frame or bracket sideof the disk thereon and with a hood for said disk, the said hoodbeingadj-ustable relative to the frame or bracket, for the purpose setforth. Y i 7. A power-transmitter, comprising a rotatable shaft, a disklongitudinally adjustable thereon, and a frame .or bracket supportingsaid'shaft and provided With-a hood for the disk thereon, the said hoodbeing adjustable relative to the frame or bracket. A

A power-transmitter, comprising a rotatable shaft, a disk longitudinallyadjustable thereon, and a frame or bracket supporting said shaft andprovided with a hood :for the i disk thereon, the said hood comprising afixed wall and a movable wall or slide.

i). A power-transmitter, comprising a rotatable shaft, a-disk adjustablethereon, and a frame or bracket supporting said shaft and provided witha hood for the disk thereon, the said hood comprising a dxed wall andtwo movable walls or slides.

l0. A powentransmitter, com prisinga rotatable shaft, a disklongitudinally adjustable thereon, a supporting frame or bracketprovided with bearin gs for said shaft at each side of the disk thereon,the said bearings being connected by an offset wall, and a hood for thedisk comprising the said oifset Wall. and 'two movable walls or slides.i

il.. A power-transmitter, comprising a rotatable shaft, a disklongitudinaliy adj uistable thereon, and a frame or bracket providedwith a hearing-sleeve for said shaft adjustablysupported thereby, thesaid adjustable bearingprovided with bea-rin gs for said shaft at eachxii supported and carried thereby.

. l2. The combination,` with drivingj and driven parte, of apowerltransmitter arranged vintermediatteol said parts, comprising a ro?v tatable shaft, friction-disks thereon, .an-d a movable frame orbracket provided with bearings forsaid shaft. at each side of -the'disksthereon. y

13. The combination, with* driving and driven parts, oi' apower-transmitter arranged intermediate of said parts, comprising arotatable shaft, friction-disks longitudinally adjustable thereon, amovable frame or bracket provided with adjustable bearin gs eX- ytendingbeyond each end thereot` for support- ,intermediate of said parts,comprisingr a rotatable shaft, friction-disks longitudinally adjustablethereon, a movable frame or bracket provided with bearingsleeves forsaid shaft adjustably supported thereby, the said a'djustablebearing-sleeves being each provided with a hood -for the adjacent disksupported and -carried thereby, and means for moving the transmitterinto position to effect operative engagement with the driving and drivenparts.

16, The combination, with driving and driven parts, of apower-transmitter arranged intermediate of said parts, and means forsupporting the transmitter, comprising :i pinv fw holt having thetransmitter pivotally counectedthereto, a stationary wacky-plate, an

adfu/stable bracket-plate carrying said pin or l5 it/ and having averticallyand',liorizontally adjustable connection with said stationarybracket plate, and a plate between .saidbracket-plates having means forlooselyengagingwitb each of thesame and 'holding the adjustable onei-u-its proper normal position relative to the stationary one, for thepurpose set forth.

17. The combination, with driving and i driven parts, of apower-transmitter pivotail y supported intermediatel of said parts, and.means for moving the transmitter into position to eiiect operativeengagement with said driving and driven-parts, com-prisinga rockthetransmitter, and an actuating part operatively connected with saidrock-arm.

18.' The combination, with driving and Adriven parts, of apower-transmitterpivota'ily supported intermediate of said parts, andmeans-for moving the transmitter into position to eect operativeengagement with said driving and driven parts, comprising a rockthetransmitter, a stop for limiting the movement of said rock-arm, and anactuating part operatively connected with the rock-arm. 19. Thecombination, With driving and driven parts, of a power-transmitterpivotally `for .moving the transmitter into position to effect operativeengagement 'With'said driving and driven parts, comprising a rock-shafthaving a cam-arm for engaging with the transmitter, the said rock-shaftalso being provided with a second arm which is arranged to engage withthe driven part or disk and operate as a brake when 'the cam-'armismoved by the rock-shaft to release the transmitter, substantially as andfor the purpose set forth.

driven parts, of a power-transmitter arranged intermediate of saidparts, comprising a rotatable shaft, friction-disks thereon, and amovable supporting-frame or bracket promitter being supported, when ininoperative tion to the drivingpart than the other is Vto thedriven-part, for the purpose set forth.

21. The combination,= with driving and drivenparts, of apower-transmitter pivotally supported intermediate et' said parts. .f-m:prising a rotatable sh afffziatinn-uisks there Jemand a movablesupporting frame or bracket provided with bearings foi-said shaft, thetransmitter being supported, when in inoperative position, with one ofits disks in other is to the driven part, for the `purpose set forth.

In testimony whereof. I have signed my two subscribing witnesses, this10th day of May, lQOZ. :G v l i WILLIAM-MCHAFFIE. v

Witnesses:

CHAS. F.- DANE, M L. FoRnns'r.

arm-having a cam-surface for engaging with supported intermediate ofsaid parts, means vided with bearings for said shaft, the trans#position, With one of its disks in nearer relaf name to thisspecification, in the presence of arm having'a cam-surface for engagingwith l 20. The combination, with driving and IOC nearer relation to thedriving part than the

